CSEMP assessment of benzo[a]pyrene in sediment at Hunterston (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 148.02 | 149.22 | -71.01 | 142.02 | |||
linear | 2 | 150.01 | 152.30 | -71.00 | 142.01 | 0.008 | 1 | 0.9298 |
smooth (df = 2) | 3 | 150.71 | 154.55 | -70.35 | 140.71 | 1.303 | 1 | 0.2537 |
smooth (df = 3) | 4 | 150.21 | 156.21 | -69.11 | 138.21 | 2.493 | 1 | 0.1143 |
smooth (df = 4) | 5 | 150.83 | 159.74 | -68.42 | 136.83 | 1.383 | 1 | 0.2396 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.043 | 5.067 | 0.02479 | 0.28159 | 0.088 | 0.9309 |
last 20 years | 2000 | 2018 | 5.043 | 5.067 | 0.02479 | 0.28159 | 0.088 | 0.9309 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 158.7 | 30.0 | -1.6661 | 0.1496 | -11.137 | 1.0000 |
ERL | 158.7 | 430.0 | 0.9965 | 0.1496 | 6.661 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (parent) data
PAH (parent) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(parent) in sediment
- Accessment criteria for pah_(parent) in sediment
Media : Sediment (unsieved)
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020